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    Is there any internal resistor for the digital I/O of my device?

    Dear all, I have a new electronic device (torque sensor) which has a 25 pins digital I/O connector. The characteristics of this connector is shown in attached. I would like to use one of the pins (pin 15) which is an input, and I would like to send pulses of 24 VDC to it. In fact I need to...
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    connect 24 V digital signal to a microcontroller

    Hello, I have a digital signal between 0- 24 V. In terms of logic states I know that for Voltages between 0 … 5 V I have state '0' and for voltages between 15 … 24 V I have state '1'. I would like to use this signal as input of my TTL microcontroller (Pic18F). Could you please give me some...
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    How to connect a power supply to my connector

    Thank you and Bests regards
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    How to connect a power supply to my connector

    Thank you very much for your help. So if I supply my device with 0.2 A and 24 VDC, it means that I give 5 VA=5 Watt of power to my device. In this case my device will consume all this power (because its consumption is 5W). Is that true? So I need to power at least more than 5 W? Right? I...
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    How to connect a power supply to my connector

    Hello, I have recently got an electronic device (a type of torque sensor). In the delivery box, there is no power supply and no cable. In the data sheet its written that I should use a 230 VAC/24 VDC power supply with 5 VA power consumption. You can see a picture of the connector of my device...
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    Control stepper motor with PIC, maximum output frequency of PIC

    Ah yes, sorry I copied it to the right place. Yes,i thinks documens should be kept and saved somewhere in companies for the use of other people. The person who used 10 years ago this sensor in our company is no more present, but he understood the importance of keeping docs. Thats helped me to...
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    Old RS-232 compatibility with new computers?

    Thank you all for your help. Especially I would like to thank "hevans" for his helpful commments. I have partially resolved the problem, however I should still correct some data conversion etc. The origin of the problem was various but the main problem was that I did not have any documents...
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    measure the current of a short pulse

    Thank you. But can I see it on a multimeter? since its too fast?
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    measure the current of a short pulse

    Hello, I have a pulse generator, generating a voltage pulse of duration 2-3 milliseconds. The voltage is around 6.5 V when I connect a special PCB to this generator. I would like to measure the "current" which goes through this PCB. I think with multimeter I can not because its too fast. I dont...
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    Control stepper motor with PIC, maximum output frequency of PIC

    Thank you all for your help. Especially I would like to thank "hevans" for his helpful commments. I have partially resolved the problem, however I should still correct some data conversion etc. The origin of the problem was various but the main problem was that I did not have any documents...
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    Old RS-232 compatibility with new computers?

    Thank you, In appandex, you can find the picture and also the data sheet that the supplier gave me. I dont know if this data sheet is well updated. Its a piezo-electric force sensor working with 24 V supply. There is a RS232 output on the backside (see picture). In the data sheet its written...
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    Old RS-232 compatibility with new computers?

    Dear all, Thank you very much for you help. I could not resolve the problem yet. In fact, I have tested my cable, it works good with another device which I have (however this device is newer). Then I have tested different parameters of transmission, including different Baud rates, parity...
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    Old RS-232 compatibility with new computers?

    Dear all, I have a problem with an old force sensor which has an RS232 output port. I would like to use this old sensor and connect it to a PC which I bought recently. So I use a RS232-USB adapter cable like this ...
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    How to connect a stepper motor to a bipolar driver

    You can find the schematic of my connections in the file attached. I left the common wires open (unconnected). This is a summary of the code: // ports direction = output // all ports =0 // direction = 1 while (1) : enable =1 pulse=0 wait () pulse=1 wait () enable =0 : This code send...
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    How to connect a stepper motor to a bipolar driver

    Dear all, I have a big problem to connect my stepper motor to a bipolar dirver. On the driver I have several inputs including (pulse+, pulse-, direction +, direction -, enable +, enable -) etc. And the outputs: motor phase A, and phase B. Questions: 1) my motor has 6 wires. And I have only 4...
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    Control stepper motor with PIC, maximum output frequency of PIC

    thanks for this complete answer!
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    Control stepper motor with PIC, maximum output frequency of PIC

    Thank you very much. Could you please explain me what is this "step" pulse? I dont get it. How can this "step" pulse gives information about Number of steps and the speed? Is it a periodical signal ? or not? Sorry I am too beginer ! ;) By the way thanks a lot
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    Control stepper motor with PIC, maximum output frequency of PIC

    Thank you very much. Yes my driver has an input for "pulse" and an input for "direction". So I guess all I should do is to connect the "pulse" input of the driver to one port of my microcontroller? Then by changing the state of this PORT, I can create my "Step" pulses? I dont want to do...
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    Control stepper motor with PIC, maximum output frequency of PIC

    Dear all, I would like to control a stepper motor using PIC18F. I have a driver circuit for this motor. The driver circuit allows me to give an input pulse to control the motor. To control the speed of the motor, I should be able to produce pulses with different frequencies. I have the...
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    threshold voltage of a MOS transistor

    in fact the switch is connected to a programmable voltage DC generator which can gives values of 0.5 V, 1 V or other values by programming the microcontroller, this is the logic: microcontroller ---> programmable DC generator --> switch Yes by "send nothing" I mean 0V. Its possible to have...
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